用极座标展点法测绘大比例尺地形图对于距测站近的测点测绘起来还比较容易,若远些点用分规卡起距离来就比较困难,展点精度可能会降低。因此一幅图上的点由于距测站远近不同而精度亦不相同,严重影响测图质量。规范已有规定,用测距仪测碎部点最大距离可测至300m,若测1:500地形图,三棱尺全长才相当于实地150m,不要说300m远的点,就是200m远的点用极座标法也很难展到图纸上去。因此,有必要探讨测绘大比例尺
沈阳军区某摩步旅二营四连始建于1939年，革命战争年代，被誉为“硬骨头六连式连队”，涌现出“攻克锦州十八勇士”等先进英模人物；和平时期，先后8次荣立集体二等功，7次荣立集体三等功
A review is presented about the studies that have been carried out on the phenolic composition of the species of the genus Agave in order to show which species
The mixture of vinylaniline and 2-hydroxyethyl mrthacrylate mixed according to the mixing ratio, was allowed to stir in order to add functionality. ZnO nanopart
Palladium (Pd) nanoparticles were synthesized using protein rich soybean leaf extract based biological process. Reduction of palladium ions by soybean leaf extr
Titanium oxide (rutile, TiO2) and zircon (ZrSiO4), known insoluble ceramic materials, are commonly used for coatings of implant materials. We investigate the re
Immobilized molecules using biomaterials and nanobiotechnology is a very interesting topic that touching almost all aspects of our life. It uses the sciences of
Externally applied magnetic fields have been used in this study to fabricate bamboo-like iron nanowires with or without a layer of Poly(methyl methacrylate) (PM
在飞蛾的世界里，有一种帝王蛾。以“帝王”来命名一只飞蛾，未免太夸张了吧？不错．如果仅仅因为它有长达几十厘米的双翅就赢得了这样的称号，的确是有夸张之嫌。但是．当你知道它是怎样
This preliminary research project has been conducted to evaluate different elastic polymer materials in terms of their applicability in peripheral nerve regener